Utility Belt MCP

Utility Belt gives Codex and other MCP clients deterministic tools for common data work. It is stateless, has no external API dependencies, stores no submitted content, and requires no secrets.

Website: https://utility-belt-mcp.kumarsaroj011998.chatgpt.site

Tools

Tool	Purpose
json_format	Validate, format, minify, and sort JSON
json_diff	Compare JSON using JSON Pointer paths
csv_profile	Detect CSV structure and data-quality issues
text_transform	Convert case, trim, sort, and deduplicate lines
encode_decode	Base64, hex, and URL encoding
hash_text	SHA-256, SHA-512, SHA-1, and MD5 digests
generate_ids	UUID v4 and URL-safe random tokens
date_time	Inspect and shift ISO dates in IANA time zones
number_stats	Descriptive statistics and quartiles

Input text is limited to 2 MB, CSV data to 10,000 rows, and numeric input to 100,000 values.

Run locally

Requirements: Node.js 20 or newer.

npm install
npm run build
npm test
npm run start:stdio

For HTTP:

npm start

The MCP endpoint is http://localhost:3000/mcp; health is available at /health.

Codex plugin

The plugin manifest is in .codex-plugin/plugin.json. The included .mcp.json starts the compiled server over stdio using ${pluginRoot}.

Install dependencies and build before loading the plugin:

npm install
npm run build

Deploy

The included multi-stage Dockerfile is ready for a stateless cloud deployment. The server reads PORT, defaults to port 3000, and exposes Streamable HTTP at /mcp.

Manufact deployment requires this folder to be committed to a GitHub repository. Once connected, deploy with:

• Dockerfile: Dockerfile
• Port: 3000
• Health path: /health
• MCP path: /mcp

Privacy and security

• No input is persisted.
• No analytics or outbound network calls are implemented.
• All tools are read-only computations.
• SHA-1 and MD5 are compatibility hashes and are explicitly labeled as unsuitable for security.

License

MIT